Improvement in lathe-dogs



R. E. BROWN.

LATHE-DOGS.

Patents d .m 11, 1876.

hl iwsses. I jjzvenl'or.

N-PETERS, PHDTLUTHOGRAFRER. WASHINGTON. D C

UNITED STATES PATENT OFFICE.

ROBERT E. BROWN, OF NEW YORK, N. Y.

IMPROVEMENT IN LATHE-DOGS.

Specification forming part of Letters Patent No. 179,762, dated July 11,1876; application filed May 11, 1876.

To all whom it may concern:

Be it known that I, ROBERT E. BRCWN,

of New York, in the State of New York, have.

invented a new and useful Lathe Dog or Driver, of which the following isa specification:

My invention consists in the arrangement of a suitable plate to beattached to the faceplate of a lathe, and provided with grooves or ways,in which two jaws are made to work, capable of being moved together orfarther apart by means of a right and left handed screw, held inposition by a suitable projection or lug attached near the middle ofsaid grooves or ways for the purpose or clamping or straddling the headof a bolt placed between the centers of a lathe, so as to carry the samearound with the lathe to enable the turning off of the bolt.

In the accompanying drawing, Figure I represents a top view of myimproved lathe dog or driver, embodying my invention. Fig. II is asection of the same.

A is a plate of any desired shape, provided with an elongated hole, .a,through which a bolt passes to fasten the same to the faceplate B.(Shown in dotted lines.) This plate A is grooved at n, in which jaws Dare fitted,

projecting some distance over the edge of the plate. Near the middle ofthe ways or grooved part a a lug, m, is arranged, in which a right andleft handed screw, 0, is held, passing through the jaws D, whereby thesame can be moved nearer together or farther apart.

The plate A is attached to the face-plate of the lathe, so that thecenter-point comes between the jaws. The bolt or other article to beturned is placed between the center-points, so that the jaws D willclamp or straddle the head or any flat part of the same, and will thuscause the bolt to turn with the faceplate.

What I claim as my invention, and desire to secure by Letters Patent, is

A plate, A, provided with ways a, central lug m, and right and lefthanded screw 0, in

combination with jaws I), when said plate A is arranged to be attachedto the face-plate outside of the center, and thejaws to project towardthe center-pin, and project on each side of the same, substantially inthe manner and for the purpose described.

ROBERT E. BROWN.

Witnesses: HENRY E. ROEDER, WM. '1. MURoH.

